Linux Kernel 3.7.3 has just been released which is the third maintenance release of kernel 3.7 series. This new release brings various bug fixes especially for Radeon graphics cards and it also fixes flickering with some high-res monitors. In this guide, we will see how to install/upgrade to this new kernel using a simple bash script as described below.
Here are some of the changes and fixes in kernel 3.7.3 taken from the changelog:

drm/radeon: fix amd afusion gpu setup aka sumo v2

drm/radeon: fix eDP clk and lane setup for scaled modes

Fixes flickering with some high res montiors

KVM: PPC: 44x: fix DCR read/write

KVM: Fix user memslot overlap check

iwlwifi: fix PCIe interrupt handle return value

iwlwifi: fix the reclaimed packet tracking upon flush queue

ALSA: pxa27x: fix ac97 warm reset

video: mxsfb: fix crash when unblanking the display

cpuidle / coupled: fix ready counter decrement

sony-laptop: fix SNC buffer calls when SN06 returns Integers

EDAC: Fix kernel panic on module unloading

drm/i915: fix OOPS in lid_notify

Add device quirk for Microsoft Lifecam VX700 v2.0 webcams.

Fixes squeaking noise of the microphone.

drm/nouveau/clock: fix support for more than 2 monitors on nve0

b43: Fix firmware loading when driver is built into the kernel

staging: zram: fix invalid memory references during disk write

ext4: fix extent tree corruption caused by hole punch

You can install this kernel in the following Ubuntu/Linux Mint distributions: